LatticeFFT.h
Classes
- LatticeFFT -- Functions for Fourier transforming Lattices (full description)
Interface
- Public Members
- static void cfft2d(Lattice<Complex> & cLattice, const Bool toFrequency=True)
- static void cfft(Lattice<Complex> & cLattice, const Vector<Bool> & whichAxes, const Bool toFrequency=True)
- static void cfft(Lattice<Complex> & cLattice, const Bool toFrequency=True)
- static void rcfft(Lattice<Complex> & out, const Lattice<Float> & in, const Vector<Bool> & whichAxes, const Bool doShift=True, Bool doFast=False)
- static void myrcfft(Lattice<Complex> & out, const Lattice<Float> & in, const Vector<Bool> & whichAxes, const Bool doShift=True)
- static void rcfft(Lattice<Complex> & out, const Lattice<Float> & in, const Bool doShift=True, Bool doFast=False)
- static void myrcfft(Lattice<Complex> & out, const Lattice<Float> & in, const Bool doShift=True)
- static void crfft(Lattice<Float> & out, Lattice<Complex> & in, const Vector<Bool> & whichAxes, const Bool doShift=True, Bool doFast=False)
- static void crfft(Lattice<Float> & out, Lattice<Complex> & in, const Bool doShift=True, Bool doFast=False)
- static void crfft(Lattice<Float> & out, const Lattice<Complex> & in, const Bool doShift=True, Bool doFast=False)
Prerequisite
Etymology
Synopsis
Example
Motivation
To Do
Member Description
static void cfft2d(Lattice<Complex> & cLattice, const Bool toFrequency=True)
2-D in-place complex->complex FFT. Transforms over the first two
dimensions and iterates over all the others. The Lattice must have two or
more dimensions otherwise and AipsError is thrown.
static void cfft(Lattice<Complex> & cLattice, const Vector<Bool> & whichAxes, const Bool toFrequency=True)
N-D in-place complex->complex FFT. Only transform over selected
dimensions. Iterate over the others. whichAxes must be the same length as
the number of dimensions in the Lattice otherwise an AipsError is thrown.
static void cfft(Lattice<Complex> & cLattice, const Bool toFrequency=True)
N-D in-place complex->complex FFT. Transform over all axes.
static void rcfft(Lattice<Complex> & out, const Lattice<Float> & in, const Vector<Bool> & whichAxes, const Bool doShift=True, Bool doFast=False)
N-D real->complex FFT. Only one half of the Hermition result is
returned. Transforms are only done on selected dimensions. The origin of
the transform is the center of the Lattice ie., [nx/2,ny/2,...] if
doShift is True. Otherwise it is the first element ie., [0,0,...]
static void myrcfft(Lattice<Complex> & out, const Lattice<Float> & in, const Vector<Bool> & whichAxes, const Bool doShift=True)
static void rcfft(Lattice<Complex> & out, const Lattice<Float> & in, const Bool doShift=True, Bool doFast=False)
N-D real->complex FFT. Only one half of the Hermition result is
returned. Transform over all dimensions. The origin of
the transform is the center of the Lattice ie., [nx/2,ny/2,...] if
doShift is True. Otherwise it is the first element ie., [0,0,...]
static void myrcfft(Lattice<Complex> & out, const Lattice<Float> & in, const Bool doShift=True)
static void crfft(Lattice<Float> & out, Lattice<Complex> & in, const Vector<Bool> & whichAxes, const Bool doShift=True, Bool doFast=False)
static void crfft(Lattice<Float> & out, Lattice<Complex> & in, const Bool doShift=True, Bool doFast=False)
static void crfft(Lattice<Float> & out, const Lattice<Complex> & in, const Bool doShift=True, Bool doFast=False)
N-D complex->real FFT. Only one half of the Hermition input is
required. If whichAxis is specified Transforms are only done on selected
dimensions otherwise they are done on all axes. The origin of the
transform is the center of the Lattice ie., [nx/2,ny/2,...] if doShift is
True, otherwise it is the first element ie., [0,0,...]
These functions will scramble the input Lattice unless the versions
with const inputs are used. The const input versions are less efficient as
they create a temporary Lattice and copy the input data into it.